Resource and Behavior Packs outside of Marketplace are not working on Realms

Unless a resource and behavior pack came from the Marketplace, any add-ons I want to add to my realm is not working. They got added, like normal, but once you played the realm, the add-ons will have no effect, but it's just there, the only problem is that it is not working. I tried it on an offline world and the add-ons work, but when I exported that world into my realm, the add-ons will just stop working, except for the add-ons that came from the Marketplace.